avplayer has no sounds when play video

Question

Check your phone is silent mode or not. If it is silent try add code below to viewDidLoad:

Swift 2.3

try! AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, withOptions: [])

Swift 3

try! AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback, with: [])

Swift 4.2

try! AVAudioSession.sharedInstance().setCategory(.playback, options: [])

Or just

try! AVAudioSession.sharedInstance().setCategory(.playback)